# RUN interval vs Tars

The clearest difference is update cadence: Tars at weekly against RUN interval's every 3 months. Tars also leads on iOS requirement (13.0 vs 15.6). On price, ads, in-app purchases and device support there is nothing between them.

Both are free to download. RUN interval sells 2 one-off in-app purchases and Tars sells 8 in-app purchases, starting at $4.99 per month. Whichever you choose, the download price is not the number that matters.

RUN interval ships an update every 3 months, Tars weekly. The most recent releases landed on October 18, 2026 and September 30, 2026 respectively.

## The numbers

| Metric | RUN interval | Tars |
| --- | --- | --- |
| Price | Free | Free |
| Rating | **[4.7 (1K ratings)](https://appshunter.io/ios/app/run-interval-running-timer/id1352270752/reviews)** | — |
| Number of ratings | **1K** | — |
| Positive reviews | 77.5% of reviews | — |
| In-app purchases | Yes | Yes |
| Ads | No | No |
| Update frequency | Every 3 months | **Weekly** |
| Monetization | Free with in-app purchases | — |
| Size | 34 MB | 29 MB |
| Requires iOS | 15.6 | **13.0** |
| Devices | iPhone, iPod, Apple Watch | iPhone, iPad, iPod |
| Age rating | 4+ | 4+ |
| Developer | [CAN YOU HEAR ME SOFTWARE](https://appshunter.io/developer/711042540) | [Nerdstorm Pty Ltd](https://appshunter.io/developer/6779889868) |

## What reviewers say

### RUN interval

[App page](https://appshunter.io/ios/app/run-interval-running-timer/id1352270752)

This app simplifies interval and Fartlek running by allowing you to set custom targets for time or distance during hard, easy, and rest efforts. It offers detailed post-run summaries, audio and visual feedback, and an Apple Watch app for enhanced training.

**Highlights:** Customizable interval sessions, Time and distance targets, Distance Goal option, Audio and visual feedback, Detailed run summaries, Apple Watch app, Strava sharing

**Features:** Family Sharing, Apple Watch app, Vision Pro support

**In-app purchases (2)**

| Purchase | Price | Billing |
| --- | --- | --- |
| The full RUN interval | $1.99 | one-time |
| The full RUN interval | $3.99 | one-time |


### Tars

[App page](https://appshunter.io/ios/app/tars-relationship-coach/id6779889866)

**Features:** macOS Compatibility

**In-app purchases (8)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Solo Growth Monthly | $4.99 | per month |
| Couples Growth Plan Monthly | $9.99 | per month |
| Growth Plan (Monthly) | $14.99 | per month |
| Solo Growth Plan Yearly | $39.99 | per year |
| Growth Plan (Yearly) | $79.99 | per year |
| Couples Growth Plan Yearly | $79.99 | per year |
| 1x Session Report | $4.99 | one-time |
| 5x Session Reports | $14.99 | one-time |


## Frequently asked questions

### Is RUN interval free?

RUN interval is free to download, with in-app purchases available.

### Is Tars free?

Tars is free to download, with in-app purchases available.

### Do RUN interval or Tars have ads?

Neither RUN interval nor Tars shows ads.

### Which is updated more often, RUN interval or Tars?

RUN interval ships an update every 3 months, and Tars weekly. Most recently, RUN interval was updated on October 18, 2026 and Tars on September 30, 2026.

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*Compared by [AppsHunter](https://appshunter.io/) from daily US App Store data. Review summaries are generated from verbatim App Store reviews.*